2835556

Information

• Patent Grant
• 2835556

• References
• Source

• Patent Number

  2,835,556

• Date Filed

  Not available

• Date Issued

  Tuesday, May 20, 1958
  66 years ago

• CPC

  • E04B7/225 - the slabs having non-structural supports for roofing materials
  • C01C3/16 - Cyanamide Salts thereof
  • E04D3/35 - Roofing slabs or stiff sheets comprising two or more layers

• US Classifications

  • 423 - Chemistry of inorganic compounds
  • 516 - Colloid systems and wetting agents
  • 544 - Organic compounds